Pine Script

Example

Say you want a 20-bar simple moving average on your chart. In Pine Script that takes one line calling the built-in ta.sma function, under a short header that names the version and declares an indicator, and TradingView recalculates it on every bar of any chart you open. Declare the script as a strategy instead and add entry and exit rules, and the Strategy Tester shows how those rules would have traded on past bars.

Hypothetical numbers, for illustration only.